Clean up GrGLSLFragmentProcessor-derived classes

src/effects/gradients/SkGradientShaderPriv.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkGradientShaderPriv_DEFINED
 #define SkGradientShaderPriv_DEFINED
 
@@ skipping 386 matching lines @@
     typedef GrFragmentProcessor INHERITED;
 
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 // Base class for GL gradient effects
 class GrGLGradientEffect : public GrGLSLFragmentProcessor {
 public:
     GrGLGradientEffect();
-    virtual ~GrGLGradientEffect();
 
 protected:
     void onSetData(const GrGLSLProgramDataManager&, const GrProcessor&) override;
 
 protected:
     /**
      * Subclasses must call this. It will return a key for the part of the shader code controlled
      * by the base class. The subclasses must stick it in their key and then pass it to the below
      * emit* functions from their emitCode function.
      */
@@ skipping 38 matching lines @@
     GrGLSLProgramDataManager::UniformHandle fColorStartUni;
     GrGLSLProgramDataManager::UniformHandle fColorMidUni;
     GrGLSLProgramDataManager::UniformHandle fColorEndUni;
 
     typedef GrGLSLFragmentProcessor INHERITED;
 };
 
 #endif
 
 #endif